mtd: spi-nor: Introduce SNOR_F_IO_MODE_EN_VOLATILE

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We don't want to enter a stateful mode, where a X-X-X I/O mode
is entered by setting a non-volatile bit, because in case of a
reset or a crash, once in the non-volatile mode, we may not be able
to recover in bootloaders and we may break the SPI NOR boot.

Forbid by default the I/O modes that are set via a non-volatile bit.

SPI_NOR_IO_MODE_EN_VOLATILE should be set just for the flashes that
don't define the optional SFDP SCCR Map, so that we don't pollute the
flash info flags.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Link: https://lore.kernel.org/r/20201005153138.6437-9-p.yadav@ti.com

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Tudor Ambarus 2020-10-05 21:01:31 +05:30 • committed by Vignesh Raghavendra

parent 354b412967

commit c6908077b1

2 changed files with 9 additions and 0 deletions

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3

drivers/mtd/spi-nor/core.c

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6

drivers/mtd/spi-nor/core.h

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